feat: Initialize GreenLens project with core dependencies and structure

Sets up the project using Vite, React, and TypeScript. Includes initial configuration for Tailwind CSS, Gemini API integration, and local storage management. Defines basic types for plant data and UI elements. The README is updated with local development instructions.

services/storageService.ts

@@ -0,0 +1,50 @@
+import { Plant, Language } from '../types';
+
+const STORAGE_KEY = 'greenlens_plants';
+const LANG_KEY = 'greenlens_language';
+
+export const StorageService = {
+  getPlants: (): Plant[] => {
+    try {
+      const json = localStorage.getItem(STORAGE_KEY);
+      return json ? JSON.parse(json) : [];
+    } catch (e) {
+      console.error('Failed to load plants', e);
+      return [];
+    }
+  },
+
+  savePlant: (plant: Plant): void => {
+    const plants = StorageService.getPlants();
+    const updatedPlants = [plant, ...plants];
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(updatedPlants));
+  },
+
+  deletePlant: (id: string): void => {
+    const plants = StorageService.getPlants();
+    const updatedPlants = plants.filter(p => p.id !== id);
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(updatedPlants));
+  },
+
+  updatePlant: (updatedPlant: Plant): void => {
+    const plants = StorageService.getPlants();
+    const index = plants.findIndex(p => p.id === updatedPlant.id);
+    if (index !== -1) {
+      plants[index] = updatedPlant;
+      localStorage.setItem(STORAGE_KEY, JSON.stringify(plants));
+    }
+  },
+
+  getLanguage: (): Language => {
+    try {
+      const lang = localStorage.getItem(LANG_KEY);
+      return (lang as Language) || 'de';
+    } catch (e) {
+      return 'de';
+    }
+  },
+
+  saveLanguage: (lang: Language): void => {
+    localStorage.setItem(LANG_KEY, lang);
+  }
+};